U.S. rejects three stem cell patents

The U.S. Patent and Trademark Office has issued a preliminary rejection of three stem cell patents held by the University of Wisconsin-Madison.

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<p><a href="http://www.physorg.com/news94909791.html">U.S. rejects three stem cell patents</a></p> <p>The U.S. Patent and Trademark Office has issued a preliminary rejection of three stem cell patents held by the University of Wisconsin-Madison. </p>